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What does @@variable mean in Ruby?

What are Ruby variables preceded with double at signs ( @@ )? My understanding of a variable preceded with an at sign is that it is an instance variable, like this in PHP: ...
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List of Java class file format major version numbers?

I saw this list of major version numbers for Java in another post: 4 Answers 4 ...
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How to get HTTP Response Code using Selenium WebDriver

I have written tests with Selenium2/WebDriver and want to test if HTTP Request returns an HTTP 403 Forbidden. 9 Answers ...
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JavaScript regex multiline flag doesn't work

I wrote a regex to fetch string from HTML, but it seems the multiline flag doesn't work. 5 Answers ...
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Sticky sidebar: stick to bottom when scrolling down, top when scrolling up

I have been looking for some time now for a solution to my sticky sidebar problem. I have a specific idea of how I would like it to act; effectively, I would like it to stick to the bottom as you scroll down, and then as soon as you scroll back up I would like it to stick to the top, in a fluid moti...
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How to remove the first character of string in PHP?

How to use PHP , Remove the first character : 13 Answers 13 ...
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Rails how to run rake task

How do I run this rake file in terminal/console? 6 Answers 6 ...
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is there an easy way to get the http status code in the failure block from AFHTTPClient?

I see that there is a list of accepted http status codes that I can modify, but I think it would be cleaner if I can get the http status code in the failure block .. ...
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Prevent ViewPager from destroying off-screen views

I have a ViewPager hooked up to a FragmentPagerAdapter that's displaying three fragments. The ViewPager appears to destroy a hosted fragment's view when it is more than one swipe away from the current position. ...
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SET versus SELECT when assigning variables?

What are the differences between the SET and SELECT statements when assigning variables in T-SQL? 4 Answers ...